AutoCodes – Buick – B0159 Buick

B0159 Buick Code - Ambient Air Temperature Sensor Circuit Range/Performance

Quick Answer

The ambient air temperature sensor allows the Heating, Ventilation, and Air Conditioning (HVAC) Control Module to monitor the temperature of the air surrounding the front of the vehicle. Common causes include Faulty Ambient Air Temperature Sensor, Ambient Air Temperature Sensor harness is open or shorted, Ambient Air Temperature Sensor circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B0159 Buick indicates Ambient Air Temperature Sensor Circuit Range/Performance.
Common causes: Common causes include Faulty Ambient Air Temperature Sensor, Ambient Air Temperature Sensor harness is open or shorted, Ambient Air Temperature Sensor circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 954

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 10, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0159 Buick Description

The ambient air temperature sensor allows the Heating, Ventilation, and Air Conditioning (HVAC) Control Module to monitor the temperature of the air surrounding the front of the vehicle. The inside air temperature sensor assembly allows the HVAC control module to monitor the temperature of the air inside the passenger compartment. The module applies 5 volts to internal input resistors that are connected to the signal circuits of the air temperature sensors. The module provides ground to the air temperature sensors through the low reference circuits. The HVAC control module monitors the voltage drops across the air temperature sensors and uses the inputs for automatic control calculations. The HVAC control module also uses the ambient air temperature input to calculate the value of the ambient air temperature display. When the air temperatures are cold, the resistances of the sensors are high and the voltage signals are high. When the air temperatures are hot, the resistances of the sensors are low and the voltage signals are low.

OBDII Code B0159 Buick - Ambient Air Temperature Sensor Circuit Range/Performance - AutoCodes.com — B0159 Buick Code - Ambient Air Temperature Sensor Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC B0159 Buick?

Faulty Ambient Air Temperature Sensor
Ambient Air Temperature Sensor harness is open or shorted
Ambient Air Temperature Sensor circuit poor electrical connection
Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the DTC B0159 Buick?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0159 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B0159 Buick code?

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Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B0159 Buick Code

1. What are the common symptoms of OBDII code B0159 in a Buick related to the Ambient Air Temperature Sensor Circuit Range/Performance?

- Common symptoms include inaccurate temperature readings on the vehicle's display, incorrect climate control system operation, and potential effects on engine performance.

2. What are the possible causes of the Ambient Air Temperature Sensor Circuit Range/Performance issue in a Buick?

- Possible causes may include a faulty ambient air temperature sensor, damaged wiring or connectors in the sensor circuit, or issues with the sensor's calibration.

3. How can I diagnose the Ambient Air Temperature Sensor Circuit Range/Performance problem in my Buick?

- Diagnosis involves using a scan tool to retrieve the specific OBDII code B0159, testing the ambient air temperature sensor's resistance, checking the sensor's wiring for continuity, and inspecting for any signs of physical damage.

4. Can I drive my Buick with the B0159 OBDII code related to the Ambient Air Temperature Sensor Circuit Range/Performance?

- While the vehicle may still be drivable with this code, it is recommended to address the issue promptly to ensure accurate temperature readings and proper operation of the climate control system.

5. How can I repair the Ambient Air Temperature Sensor Circuit Range/Performance problem in my Buick?

- Repair steps may involve replacing the ambient air temperature sensor, repairing any damaged wiring or connectors, and clearing the OBDII trouble code with a scan tool after completing the repairs.

6. Is it possible to reset the B0159 OBDII code related to the Ambient Air Temperature Sensor Circuit Range/Performance without fixing the underlying issue?

- Resetting the code without addressing the root cause will likely result in the code reappearing once the vehicle's systems detect the persistent fault.

7. Are there any DIY tips for troubleshooting the Ambient Air Temperature Sensor Circuit Range/Performance issue in my Buick?

- DIY tips include visually inspecting the sensor and its wiring for any visible damage, checking for loose connections, and ensuring the sensor is securely mounted in its correct location.

8. Can extreme weather conditions affect the Ambient Air Temperature Sensor Circuit Range/Performance in a Buick?

- Yes, extreme temperatures, exposure to moisture, or physical damage due to road debris can all impact the sensor's performance and lead to the B0159 OBDII trouble code.

9. How long does it typically take to repair the Ambient Air Temperature Sensor Circuit Range/Performance issue in a Buick?

- The repair time can vary depending on the extent of the issue and the availability of replacement parts, but it is generally a relatively quick fix that can be completed within a few hours.

10. Will fixing the Ambient Air Temperature Sensor Circuit Range/Performance problem improve my Buick's fuel efficiency?

- While addressing this issue won't directly impact fuel efficiency, ensuring proper sensor function can contribute to overall vehicle performance and potentially optimize fuel consumption in the long run.